Grind together breadcrumbs, cayenne pepper, salt and thyme. Place them in a bowl.
Prepare two more bowls: one with egg, heavy cream, a couple of tablespoons of orange juice and a pinch of salt, the other one with the flour and a pinch of salt.
Cut tomatoes in 1-inch slices, more or less. Coat each slice in flour, then in the egg/cream and finally in the bread.
Place them on an oven sheet. I have a perforated one that is perfect for oven frying. I guess an oven-frying rack could work as well or even better.
Meanwhile prepare the sauce: mix kefir, 2-3 tablespoons of orange juice, 2 pinches of salt and one of pepper.
Serve the tomatoes hot, with the sauce, and smile!